Everything

referencetestingprotocoldeveloper

Summary

A reference/test server that exercises every MCP feature — prompts, resources, tools, and sampling — for building and debugging clients.

Features

Demonstrates prompts, resources, and tools
Sampling and logging examples
Useful for client development
Covers the full protocol surface
No external dependencies

Installation

Set up this MCP server in your favorite AI agent — copy a ready-made configuration below.

Any MCP-compatible agent

Most agents (Claude, Cursor, Windsurf, VS Code, and more) read a standard mcpServers configuration.

Open your agent's MCP configuration file.
Merge the snippet below into it.
Restart the agent — the "Everything" tools will be available.

{
  "mcpServers": {
    "everything": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-everything"
      ]
    }
  }
}

Claude Code

Add the server with a single CLI command.

claude mcp add everything -- npx -y @modelcontextprotocol/server-everything

Claude Desktop

Add the server to claude_desktop_config.json (Settings → Developer → Edit Config).

{
  "mcpServers": {
    "everything": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-everything"
      ]
    }
  }
}

Description

The Everything MCP server is a reference and test server that exercises the full MCP protocol: prompts, resources, tools, sampling, and more. It is intended for developers building or debugging MCP clients who want a server that demonstrates every capability.